The Opel Omega is an executive car engineered and manufactured by the German automaker Opel between 1986 and 2003. The first generation, the Omega A (1986–1993), superseded the Opel Rekord, was voted European Car of the Year for 1987, and was available as a saloon or estate. The second generation, the Omega B, was manufactured from 1993 to 2003.
Rebadged variants of the Omega were marketed worldwide, including in North America as the Cadillac Catera, in Great Britain as the Vauxhall Omega and South America as the Chevrolet Omega. Re-engineered versions were manufactured in Australia since 1997 as the Holden Commodore (and its derivatives) since 1999, which were in turn exported to South America as the Chevrolet Omega and the Middle East as the Chevrolet Lumina.
Production of the Omega was discontinued in 2003 with no direct replacement, apart from the Australian re-engineered versions that carried on until 2006 as a sedan and 2007 in other guises. After vacating the executive car segment, Opel's tried to fill the market void with "expensive" versions of the then-existing Vectra and Signum ranges. Opel and Vauxhall re-entered the market segment in 2008 with the Insignia and the VXR8, the later being sold only in the UK.